Pam and Mark are considering jobs where they will be paid strictly on commissions. The commissions is expected to be 5% on all sales of house water filters they close. Pam's goal is to earn a gross salary of $65,000 a year. Mark's goal is to earn a gross salary of $25,000 a year part-time. How much in house water filters sales would Pam and Mark need in order to reach their targeted salaries?